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May 5th, 2015

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1 EDX port normally has four pins: 12V+ , D+, D-, GND. Sometimes, the pin of 12V+ is skipped if the devices have no DC supplier. 1.2 If the EDX devices itself have DC power, it is not necessary to connect 12V+. However, GND is required to be connected to avoid the interference. 1.3 Shielded twin twisted cable is required. The wire gauge should be at least AWG 24.

People I Admire the MostTechnical GuideEDX Wiring Guide11 Cable1.1 EDX port normally has four pins: 12V+ , D+, D-, GND. Sometimes, the pin of 12V+ is skipped if the devices have no DC supplier. 1.2 If the EDX devices itself have DC power, it is not necessary to connect 12V+. However, GND is required to be connected to avoid the interference. 1.3 Shielded twin twisted cable is required. The wire gauge should be at least AWG 24.Figure: Shielded Twin Twisted Cable1.4 If the length of the cable is longer than 30M, we recommend as least use AWG 22 cable to avoid the issue of voltage drop. Otherwise, all devices powered by EDX port should be at least get 10V.AWG 24: 0.205 mm AWG 22: 0.326 mmExample: * AWG 22 cable: At 12V DC 0.5Avoltage drops to 10.37V in the length of 30M. * AWG 24 cable: At 12V DC 0.5A, voltage drops to 9.4V in the length of 30M. 9.4V is smaller than the minimum voltage requirement (10V).21.5 The shield of the cable should be connected to GND pin of the cable to minimize the interference.32 Wiring2.1 All devices powered by EDX port should be at least get 10V. Otherwise, additionalpower supply unit should be added to the system. 2.2 The length between to EDX devices should be shorter than 200M. If the length is longer than 200M, a repeater/isolator (DP-105R) should be added to the system. 2.3 In the end of the EDX cable, it is recommended to add a 120ohm resistor (at least 0.5W). 2.4 If the devices in the system is more th